Hey all! I'm new to the board. My name is Stacy and my tiel's name is Boomer. He is a 7 month old normal grey cockatiel. I loved reading the posts before I registered. Everyone here has helped Boomer and I so much. Boomer has ALMOST quit biting me now. This morning he was a little cranky; but I think that's because he is molting. Anyway, question is, what does it mean when Boomer puffs up his feathers on his chest and around his face. Sometimes when he does this you can't hardly see his beak. Any response to this post would be most helpful. Thanks in advance, Stacy.